Cope and drag plate



March 3. 1931. A. K. LAUKEL 1,794,778

COPE AND DRAG PLATE Filed Dec. 29, 1928 Il /IIIA fil.

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INVNTOR rtbrrr .KI Laak!! y 45 lpartings.A

1 `Applieationvmeti-December29,192s. serial no. 329,221. l

Y In my United StatesPatents No. 1,570,634 of 1J anuary 26, 1926 and. No.; 1,649,312 .of Novemberl 1927v and my cofpendingapplicationf Serial;y No.1108,715, filed 13, y|| 14926', I yhave disclosedgmeans Yand .methods of producingjpatternequipment by the elec;

trodeposition oflmeta'lon a mold ofimatrix taken frornlthe l object to be reproduced. In the' application fof these inventonsto @Ore .and vdrag plates ;W-ithlg-regular;-or' irregular partings;V 'for use injfmoldingmachines, there arises the problern ofprovidingisuitable caryv lyingandgbackinggmeans for the. electrQde` Stood in this 'Gonne.Ct'OIfythat7 in fthe interest of economyofY-time andmaterial consumed in the platingfoperation, the depositshould be made `no Athicker :than necessary- -tofmain-r tain its formduring manipulation. aftergref movvalfromfthefbathk YA-suitable reinforcing means fonthe deposit @thereforis necessary;A i 1, f il; :'The obj ect, of; fthe present invention is to .provide ga construction'- for cope anddrag plates satisfying the-,conditions lset forth.` It may be stated that apart-of 'the/face of the pattern is notmoldingsurface -butmere-v Ely facing', and this part is preferablyvprovided in the nature ofa machined face plate lattached to theQmoldfor-matrix prior-fito `impositr firmly gadheres. gIhis ,face plate pref- -erably includes locating members', such j as apertured ears, for co-ope'rationgvvith corre- Spending locating membersin the flasleof the molding machine. g r

lthe--loa th, a suitable-back' issecured-q-torthe reverse side ofthe face! plate, and4 a; filling 4 material such asfmagnesiumoxyehloride cef'k ment yis packed intothe lspace betweengthe back: and :the deposit. -.i f 2. tl;-W11 fbeiseen' LS vthe description proceeds that thisy method isi/applicable equally, to regular and irregular 1 The invention is, -fully1disclosedwby way of example inY thev followingl description and inthe accompanying drawings in which;

, Figure 1 is a Afrag'mentary4 plan ,view of a '50 mold italien; from, a manifoldioff gasoline 1 v"Initiating at 'the ends of the several planes-de- V"terr'nined*according to the irregular parting -as indicated by the lines 8 in Figurel. These strips are secured 'to the mold by 1screws 9 engine and having :the facei'platepappli'ed v y Figure 2 is across sectional view. of the moldV vvitlrthe deposit thereon,correspond ingtor a section on theline 2-2 of F igure 1; :SriL r Figurey 3 is asimilar viewshovving the del' Vpositrpartly filled and the back laid `upon the faceplate; v

Figure 4 1s asimilar viewshowingthe face ,pletely filled; Y j ,F"'gure 5f is a 'similar sectionshowing the completed patternremoved from-the mold and facing upwards ;"and i Figure isaJperspecti-veview of the cope 65 or drag plate. l I g Y, Reference to these vieWsWill nover bemade" by, use of like characters which are employed to' designate corresponding' parts throughl out. y. 70

In Figures 1 and ',2'fis illustrated. a mold or matrix, 1 formed,fafter theffashion of a plastermatch in ordinary-pattern making, over 'the kpatterntol be vreproduced which may vbeof lW'koodgmetal orfevengplaster. `y The prep- 75 aration ofthis vfmold, x including vthe formationoftheconducting surface and treatment i to ;resist'; deterioration in the bath, is fully disclosedl in the yabove mentioned patents fand application. e j Inasmuch as the v marginal portion of the face of xa cope ordrag plate is a plane'surface ori'combination of planefsurfac'earthe ysanne need 4not bev deposited but mayV be Apro'-, videlin the nature of a face plate or fram- 85 ingl member 3 surrounding the impression'4 to beplated. .In thecase of afregular `parting,`y it is obvious that the face plate lies in one plane; *and` in order' tojdemonstratethe applicability of the invention'to irreg'fular part- ',90 ingsjthemold 1 yis illustrated as having'high y Y land lovv vpartstand respectively vvvithga'step 'or incline"'ftherebetvveen; In suchV cases the vfaceplate is made'uplof separatefstrips'terpassed intofdrill holes 10"for1'nedy from' the back of .tl`1e mold,. the screws being passed loo plate Vattached to thebackyn'and the latter comeo through the mold and threaded into the strips which have been previously tapped for the purpose. The inner edge of the face plate is bevelled' as at 11, and the bevelled edge is corrugated transversely as at 12 for reception of the deposit 13. The bevelled edge Yprevents the deposit from 'being pulled out lof the face plate-in the use of the pattern, and the corrugations increase the area of contact and hence the adhesion between the face plate and deposit. The various depths of the iin-` pression in the mold 1 are designated Vbythe corresponding characters a, o, Y c, and CZ in Figures 1 and 2. I

After removal of the mold 1 with the deposit the'reoir from the bath, a backing member is laid upon the farce plate and fitted thereto. This member includes'an enclosing wall 15- with a partitiongenerally parallel tothe face plate 'and hafving :high and low Yp'ortions 16 and 17 respectively vover the high and low portions of the face plate, Ywith an'inoline or step 18 therebetween. The back member is, moreover, braced or reinforced by webs 19 on the outer side of the partition as shownin Figure 6. YT he contacting edge 2O of the 'back isliitted accurately over the face plate so that it lies flat Vand firmly thereon. The deeper parts of the pattern maybe lled with material 21 priorto permanently attaching the'bacl; to the face plate in the manner presently tolbe described.

i The aningmteraijis 'preferabiytne Capa Y satisfies theserequirements.

found that magnesium oXychloride cement 't When the back 15-20 has been fitted onthe Vface, plate in the manner indicated, itis clamped thereto by means of wood clamps or the like engaging also the bottom of the mold, and the screws 9 `are removed. The contacting edgeof the back is spotted ormarked by a suitable instrument inserted Vthrough the screw'holes formerly occupied by thelscrews 9. The back isn-now lifted so that it maybe tapped as at 22. at thev sportsj--inv registration with the screw holes in theface plate. After being tapped, ther back is remo'unted'ontheV Y face plate in itsfitted relation-thereto, and the parts are permanently securedtogether by screws 23 countersunk in the face plate and threaded into the tapped holes22. The remainder of the space between the deposit 13 and the partitionI 16-18 is rammed with more duction of the cement 2l.

in line ywith the apertures 27'.

reproduction. Y LA cope 'or drag platecomp'risin'ga fac'e plate, members on said face plate for locating 'the sameA with respect to 4a'iiaskfan electro- `filling material through holes 24 in the partition. Y

The mold l is now broken away from the deposit, and additional screws may be driven through the face plate into t-he back if desired.

Also, the intermediate parts of the depositv maybetied to the back` by longer screws 25 having their heads countersunk inthe de-V posit and their free ends threaded Yinto the partition 16-18as shown in Figure 5.V Holes r -may be formed in the cement for the screws' V25 by positioning dummy pins between the def posit-and partition prior to the first intro- A' will b e seen in Figure 1 that the face plate `3 is formed, preferably at its shorter edges, with lugs or ears 26 apertured at 27 to register withlocati-ng pinsV on the flask or molding machine to -which'thexcope or drag plate is to be applied'.l The apertures 27 are located preferably during the mounting of the face plate on the mold and with dueV regard to the relation of the cope and drag plates to the flasks and to eachother. The edge 20 of the back also has lu'gs28 superimposed up'on the-lugs2'6 and drilled atv 29 Although a speciiioembodiment ofthe invention has been-illustrated and described, W y

it'will be understood that various alterations in theV details ofcon'struction maybe made without departing from the `scope of the nvention as indicated by the appended claims.

` -l/Vliat I claim 'is:'v

1. Afcope or drag plate comprisinga face .ion

plate, an electrodeposited reproduction of Y the molding ,surface of a pattern secured within said face p1ate, a backing member fitted on the back side of fsaid face plate 105 confined within said backing member and reand secured thereto, and a filling material inforcing said reproduction.'

2. A cope lor drag plate comprisingalface plate, -an electrodeposited reproduction of the moldingv and parting surface of a pattern secured: within saidV vface plate, a backing member fitted Von-the back side of said face plate and secured thereto, and a filling material Vconfined within said backing member Y and reinforcing said reproduction.

3. VA copeor drag lplate comprising a` face plate, Van ele'ct'ro'deposited reproduction pf themoldin'g surface ofa pattern secured ilo within said face plate, a backing member Y fittedon the back side-,of said face plate and secured th'ereto,and a cement confined withinsaid b'a'ckingmember and reinforcing said Y depositedV reproduction ofthe molding surface of a pattern secured within said` face plate,a backing member fitted onthe back sideof' said-face plate and secured thereto, 'i

and a'iilling material conned Within said backing member and reinforcing said reproandv locating members on said backing memfrom a surface to be reproduced, preparing ber and coinciding with saidfirst named locating members.

6. An element of pattern equipment comprising a face plater deiining an enclosure and having its inner edge beveled and corrugated transversely on the bevel, an electroimpression on said surface, plating on said impressed surfaceand against said face plate, fitting. and securing abox-likevbacking mem-y ber on the backside of said face plate, packing a filling material into ysaid backing member and against the reverse side of the de'- posit, and finally removing said face plate,l

deposit and filling material in yassembledform from said matrix.

In Witness whereof I have hereunto setv my-V i75 hand. v

. ARTHUR K. LAKEL.

deposited reproduction of the molding face of a kpattern element disposedl Within said face plate and having its marginal portion plated against said beveledv and corrugated y edge of the face plate.

7.An element of pattern equipment comi prising a face plate defining an enclosure and having its inner edge'beve-led and corrugated transversely on the bevel, van electrodeposited reproduction of the molding face of a pattern element disposed Within said faceplate and having its marginal portion plated against said beveled and corrugated edge of the face plate, a backingmember fitted on the back side of said face plate, and secured thereto, and a filling material confined Within said backing member and reinforcingsaid reproduction. f

8. An article of manufacture comprising a y face plate forming an enclosure and having its inner edge beveled and corrugated transversely on the bevel, an electrodeposited reproduction of aface `of a model disposed ginal portion plated against saidv beveled and corrugated edge.

Vvvithin vsaid face plate and having its Inarv i Y 9. The method ofibuilding a coi-pe or drag i i i i Y plate consisting in forming a cast yor matrix said matrix for immersion in an electrolytic vbath and for plating on the impressed surfaceV thereof, applying a face plate to the impressed surface of the matrix and around the impression on said surface, plating onsaid impressed surface and against said face plate, fitting and securing a box-like ybacking member on the back side offsaid face plate, andv packing a cement into'said backing member v and against the reverse side of the deposit. Y'

l0. rlhe method of building a cope or drag plate consisting in forming a cast or matrix froma surface to be reproduced, preparing said matrix for immersion in an electrolytic bath and for plating on the impressedsur- -Y face thereof, applying a face plate to the impressed surface of the matrix and aroundr the 

